Tolong jawab beserta caranya !

Botol minuman ringan = x
Kaleng sarden = y

Yang ditanya = x . ......?

4x + 3y = 10.700 | kali 5
3x + 5y = 14.900 | kali 3
______________
20x + 15y = 53.500
9x + 15y = 44.700
_______________ [ - ]
11x = 8800
x = 8800 / 11
x = 800 ( B )

# semoga membantu.